Renting or leasing an aircraft can be a cost-effective alternative to owning your own jet or plane. Many aviation companies offer rental or leasing agreements for every size and shape of aircraft, from tiny Cessna airplanes to luxury Gulfstream jets to your own private Boeing helicopter. Sales of such personal vehicles, whether for passenger or freight use, can cost millions. Businesses and individuals looking to enter the world of aerospace flight might consider looking into pre-owned planes, but leasing allows someone else to shoulder the additional costs of airport space, fuel and upkeep. Rental is a viable option when the plane or helicopter is not needed for constant use.